We begin by noting the exact form of the 2-species generator in the
moment representation. A set of descaled variables was introduced
in [1]}
\({\omega }_{+}& \equiv \epsilon / k_1& {\omega }_{\Delta }& \equiv k_2 / {\bar{k}}_1 - {\omega }_{+}\nonumber \\& =\varepsilon n_C^2 / {\kappa }_1&& =k_2 n_C^2 / {\bar{\kappa }}_1 - {\omega }_{+}\nonumber \\& \equiv {\hat{\omega }}_{+} n_C^2&& ={\hat{\omega }}_{\Delta } n_C^2\) 
